DP Physics (last assessment 2024)
Question 18M.3.HL.TZ2.19a
| Date | May 2018 | Marks available | [Maximum mark: 3] | Reference code | 18M.3.HL.TZ2.19a |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Explain | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 3]
18M.3.HL.TZ2.19a
(a)
Explain the evidence that indicates the location of dark matter in galaxies.
[3]
Markscheme
«rotational» velocity of stars are expected to decrease as distance from centre of galaxy increases
the observed velocity of outer stars is constant/greater than predicted
implying large mass on the edge «which is dark matter»
OWTTE
1st and 2nd marking points can be awarded from an annotated sketch with similar shape as the one below
[3 marks]
